Anyone allergic to the pumpkin spice latte from Starbucks?

I used to drink this a lot but developed an allergy. Head to toe hives whenever I’d drink it. I avoided it, and they never came back so I pretty much pinpointed it was that. I noticed even when I ate the pumpkin bread from Starbucks I would feel awful (brain fog/headaches). I am really curious as to what exactly it is in the PSL sauce that I am allergic to. Anyone else have this issue?

ETA: I am not allergic to pumpkin itself. That has been ruled out.